Results 51 to 60 of about 417,330 (328)

Influences of Fracturing Fluid Injection on Mechanical Integrity of Cement Sheath under Four Failure Modes

open access: yesEnergies, 2018
The significant decreased wellbore temperature and increased casing pressure during fracturing fluid injection present a big challenge for the mechanical integrity of cement sheath in fracturing wells.
Honglin Xu   +3 more
doaj   +1 more source

Content of trace elements in the soil of typical chernozem depending on methods of primary tillage

open access: yesЮг России: экология, развитие, 2021
Aim. To determine the level of trace elements in typical chernozem when using different systems of primary tillage.Materials and Methods. In the study systemic, chemical, comparative‐ analytical, field, laboratory and statistical methods were used and ...
D. V. Dubovik   +3 more
doaj   +1 more source

Effects of the disk tillage on soil condition, crop yield and weed infestation [PDF]

open access: yes, 2002
This research was instigated by the fact that during the last decade annually repeated shallow disk tillage on the same field became frequent practice in Hungary.
Birkás, Márta   +4 more
core  

Impact of Pre‐Oxidation Treatments on a Recycled MgO/Steel‐Composite as Carbon Free Anode in Aluminum‐Electrolysis Environments

open access: yesAdvanced Engineering Materials, EarlyView.
Cermets (60 vol.% AISI 316L stainless steel, 40 vol.% recycled MgO), intended for use in aluminum electrolysis, were pre‐oxidized in three furnaces with different heating technologies and subjected to a cryolite corrosion test. The different atmospheres influenced the formation of oxide layers, which in turn affected corrosion resistance and ...
Patricia Kaiser   +4 more
wiley   +1 more source

3D (Bio) Printing Combined Fiber Fabrication Methods for Tissue Engineering Applications: Possibilities and Limitations

open access: yesAdvanced Functional Materials, EarlyView.
Biofabrication aims at providing innovative technologies and tools for the fabrication of tissue‐like constructs for tissue engineering and regenerative medicine applications. By integrating multiple biofabrication technologies, such as 3D (bio) printing with fiber fabrication methods, it would be more realistic to reconstruct native tissue's ...
Waseem Kitana   +2 more
wiley   +1 more source

Overinflated tractor tires waste fuel, reduce productivity

open access: yesCalifornia Agriculture, 1996
Under typical California farming conditions, field experiments have shown that using a low/correct inflation pressure for radial ply tires can result in significant sayings in time and money.
K Lancas, S Upadhyaya, M Sime, S Shafii
doaj   +2 more sources

Key aspects on the biology, ecology and impacts of johnsongrass [Sorghum halepense (L.) Pers] and the role of glyphosate and non-chemical alternative practices for the management of this weed in Europe [PDF]

open access: yes, 2019
Sorghum halepense (L.) Pers is a common and noxious worldwide weed of increasing distribution in many European countries. In the present review, information on the biology, ecology, agricultural, economic and environmental impact of johnsongrass is given,
Antonopoulos, Nikolaos   +9 more
core   +3 more sources

Laser‐Induced Graphene from Waste Almond Shells

open access: yesAdvanced Functional Materials, EarlyView.
Almond shells, an abundant agricultural by‐product, are repurposed to create a fully bioderived almond shell/chitosan composite (ASC) degradable in soil. ASC is converted into laser‐induced graphene (LIG) by laser scribing and proposed as a substrate for transient electronics.
Yulia Steksova   +9 more
wiley   +1 more source

Near‐Infrared Emitting Lanthanide Catecholate Giant Single Crystals – Morphology Control and Photon Down‐Conversion

open access: yesAdvanced Functional Materials, EarlyView.
Controlled syntheses of lanthanide coordination polymers based on the dihydroxybenzoquinone (DHBQ) organic linker afforded large single crystals of Ln‐DHBQ CPs (Ln = Yb, Nd). A novel structural variant of Yb‐DHBQ is identified by means of single crystal diffraction analysis.
Marina I. Schönherr   +7 more
wiley   +1 more source

Métodos de manejo de aveia preta para evitar sua ressurgência como planta daninha em trigo Black oat management methods to avoid its resurgence as weed plant in wheat

open access: yesCiência Rural, 2009
A aveia preta é a cultura de cobertura de inverno importante no sul do Brasil. Entretanto, a aveia preta, do mesmo modo que o azevém anual, é uma planta daninha em culturas comerciais de inverno.
Renato Serena Fontaneli   +3 more
doaj  

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